Reaming or boring tool



2 Sheets-Sheet 1 T; R on. N \w T 1 w \m, m Q m F i I m H 4 /.wm, Q Q n q ih m 1 *3 m, w u N May 31, 1927.

Filed May 5. 1924 May 31,1927.

G. W. BENEDICT REAMING OR BORING- TOOL Filed May 5. 1924 2 Sheets-Sheet 2 Patented May 31, 1927.

PATENT OFFICE.

GEORGE XV. BENEDICT, F

REAMING 01? Application filed May 5,

In my pending application tiled Feb. 8, 1924;. Ser. No. 691,388, there is disclosed a connecting rod reconditioning machine thatmay be advantageously used in repair shops for motor repair work in connection with the reaming, straightening and testing of connecting rods for any inaccuracies, and this application is directed to the reaming or boring of the bearings of the connecting rod by utilizing a portion of the reconditioning machine.

j The primary object of my invention is to furnish an arbor with a novel reaming or boring instrumentality and progressively shift the arbor in a rod hearing so that a bushing or other member therein may be reamed and the reamed surface burnished so that one operation will finish thebearing for perfect fitting on a crank shaft piston pin or other structure.

Another object of this invention isfto provide positive and reliable means for centering and positively holding a connecting bearing relative to a reaming instrumentality so that the hearing may be operated upon with the greatest of precision.

A further object of this invention is to provide simple and durable means for causing areaming or boring instrumentality to he fed into operation, relative to a hearing, when the reaming or boring instrumentality is rotated, said feeding means being reversible to permit of operations being expeditiously performed.

. A. further object of this invention is to provide a reaming orboring instrumentality in the form of a hit having a reaming or cutting edge and facets which provide clear ance for removed material and attordmeans of burnishing a reamed or bored surface, the bit performing "Functions which have heretofore required more than one bit. consequently there is a saving in time and labor when reconditioning the hearings or a connecting rod. 7

The above are a few of the objects attained by my invention and others will hereinafter appear as the reaming and boring machine is described in detail. by aid of the accompanying drawings wherein DETROIT, TDJCEfJI-LIGAN, .ASSIGINOR TO KENT-MOORE ORGANI- ZATION, OF DETROIT, ll/LICHIGAN.

onnie TOOL.

1924. Serial N0. (11,092.

Figure 1 is a planofa part of my reconditioning machine showing a connecting rod in position preparatory to having a bearing thereof reconditioned;

F 1g. is a side elevation of a bit constituting part of a roaming and boring instrumentality;

F1 3 is an end view of the same;

Fig. i is a plan of the bit;

Fig. 5'is an end view of the machine partly in section;

Fig. 6 is a longitudinal sectional view taken on the line VI VI of Fig. 1;

Fig. 7 is a cross sectional view taken 011 the line VIII-VIII of Fig. 5;

Fig. 8 is a perspective view of the bit;

Fig. 9 is an enlarged cross sectional view taken on the line IX-IX of Fig. 5;

Fig. 10 is an enlarged detail View of a :feed nut. and i Fig. 11 a cross sectional view of a portion of the nnichineashowing. the bit relative to a hearing. I

The reconditioningmachine disclosed in the pending application above referred to includes a base 1 and at oneend of said base are opposed V-jaws 2 provided with flexible hold-down clamping members 3, preferably in the form of cables which have the loop ends 4: thercoi anchored between ears 5 carried by the jaws The opposite ends oi the flexible members 3 are provided with exteriorlv screwthreaded members 6 extendingbetween lugs 7 of the jaws 2 and provided with nuts 8 which may be rotated against the lugs 7 to pull upon the flexible members 3 and cause said members to cooperate with the jaws 2 in providing an anvil and clamping means for bearings 9 and 16 adapted to have an arbor or spindle 10 lo tate therein.

Adjacent the anvil are clamping means for holding a connecting rod 11, said clamping means being arranged on ways 12 and including; an ad ustable support 13 and. ad-

just-able jaws 14. The support 13 is adapted to engage the lower face of the rod 11 as viewed in Fig. at, and the jaws 14L engage the sides of the rod. The engagement of these elements is such as to support the rod 11 with its large bearing 15 in position for the arbor to extend theretlnrough, and after the large bearing has been properly alincd and adjusted for a reaming or boring opera tion, the jaws 14: can be tightened to firmly hold the shank oi the connecting rod while operatioi'is are performed upon the large bearing 15; 'i i The bearing 16 has its inner elnl providcd with a yoke 17 and in the ends of the yoke are adjustable screws 18 adapted to engage the connected ears or lugs ll) of the hearing 15 said bearing being coi'nposed of semi cylindrical halves clamped together to retaina bushing; 20 withinthebcarin p The screws 18 are adapted to force the large bearing: 15 against the end of the vyoke 17 and this adjustment is only temporarily made until the large bearing! 15 has been properly centered by a cone member 21 slidable on the arbor 10, and adapted to enter the end ot the bearing 15 to properly center said hearing about the arbor l0. 1 .ekltcr this adjustment has been made thcscrews 18 can be adjusted to positively hold the bearing 15 in the yoke and the jaws 1.4 may be further clamped in engagement with the con nectinp rod, whereby the connecting rod will be firmly held foroperations upon it.

Qnc end of the arbor mspindle 10 may be driven by power or by a, hand crank 22 and the opposite end of the arbor is provided with a detachable and reversible feed screw 28. The screw.23;has reduced ends 24L provided with spring pressed detcnts 25. Either of the reduced ends 24 may be placed in a recess or socket 26 in the: end ofthe arbor 1t and the detent is adapted to snap into an oaeninnQT COITlIl'llllllCtlllll'l" with the socket t'i r 26, thus anchoring" the screw 23 as a continuation of the arb oi lO, o

On the screw 23 is a split nut 28 through which the screw is adapted to feed. said nut having clamping means 29 so that it may be :adgustcd relative to the screw. also has aniopenin g 30 and cxtendlng therei The nut in isfla detachable arm 31 inounted in the bearing 16, said arin holding; the nut 28stationary so that the screw 23 1nay teed therein and shift the arbor 10 relative to the connecting rod hearing 15. "After the reaming or boring operation has been performed the arm r3l can be removed, the screw 23 detached from the arbor and reversed, and the arbor and screw shifted until the arm 31 may be replaced, thus placing the arbor and I its feeding means in condition for another reaming or boring operation.

The arborlO is provided with a tacettlfl for a bit having a shank 34 extending into a socket 35 provided therefor in the arbor 10. Opposing" the socket 35 is a recess 36 for a screw 37 which enters the shank34 of the bit and clamps said biton the facet the vertical; thewall -11 inclined seven dc grees inwardlptrom the vertical, and the wall 44 forming, part ota clearance groove 4-5 intersecting the ridge 46 between the facets 3S and 39 and from which ridge the cutting or reaming; tooth walls 41 to 14; inclusive. While thecutting edge 510 performs a reaming or cutting; the wall 41-2 accomplishes aburnishing of the reamed or bored surface, and the wall 471. is practically; a continuation of a bcveledcnd wall 47 of the bit. This bit and its angular walls has been worked out tothe thousandths part of an inch so that one operation on the bushing 20 will place the same in perfect condition, without additional operation, and this alone saves time and labor.

The cone member 21 isslottcdoas at 418, to provide clearancciror the bit 33, particularly when clamping the hearirn; 15 in position for a reaming or borinp operation.

As the arbor 10. is driven the bit will accurately ream out andhurnish the bushing 20 and after the bit has traversed the hushing the feed screw may be detached, the arbor retracted and the feed screw again in-i stalled in a reverse positioin thus placing the machine in condition for another operation. It is obvious that without removing the arbor 10 other bits may be installed or shims used to increase the radial distance of the cutting; edge from the axis of the arbor 10. c i i a a It is thought that the operation and utility of my reaming and boring: machine will be apparent without further description and while in the drawing: there is illustrated a preferred embodiment of my invention, it is to be understood that the structural elements are susceptible to such variations as fall within the scope of the appended claim. What I claim is: i i a A reconditioning machine comprising a base. clamping means on said base adapted forholding a bearing of a connecting rod, a rotatable arbor detachably supported on said base and adapted to extend through the bearing of the connecting: rod, a reversible feed screw coaxially of said arbor said teed screw having: reduced endseithcr off which may he placed in ahead of said arbor, a dc is formed by the ill tent in each reduced end of said feed screw engageabie with the end of said arbor for securing, said feed screw thereto, a nut on said feed screw, and an arm disposed above said feed screw and having the ends thereof detachably mounted in said nut and in said base so that said nut will be held stationary relative to said base yet permit of said nut being adjusted when said arm is removed therefrom, and a bit carried by said arbor and adapted to be shifted through the bearing of said connecting rod by rotation of said arbor.

In testimony whereof I a-HiX my signature.

GEORGE \V. BENEDICT. 

